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The Shoreline Firewall, more commonly known as "Shorewall", is a Netfilter(iptables) based firewall that can be used on a dedicated firewall system, amulti-function gateway/router/server or on a standalone GNU/Linux system.

As of version 4.5, shorewall consists of 3 packages: * shorewall-core, containing the common elements to both IPv4 and IPv6 components* shorewall, the IPv4 component* shorewall6, the IPv6 component

The shorewall-core package is needed for both but now you can install the IPv6packages without needing the IPv4 one if you are on aIV6 network only.

This requires shorewall-core (and xtables-addons to use the new per-IPaccounting feature).